//
//  Person.m
//  02-ClassAndObject
//
//  Created by QC.L on 16/7/5.
//  Copyright © 2016年 QC.L. All rights reserved.
//

#import "Person.h"

@implementation Person

// 实现: 方法 加 { }
- (void)sleep:(NSInteger)time {
    // NSLog属于C语言的函数
    NSLog(@"这个人睡了%ld年", time);
}

- (void)setName:(NSString *)name {
    if (_name != name) {
        [_name release];
        _name = [name retain];
    }
}

- (NSString *)name {
    return [[_name retain] autorelease];
}

// 命名规范
// 实现大括号前, 要加空格/回车
// 指派初始化方法
// 无论调用哪个初始化方法, 都会执行的初始化方法, 称为指派初始化
- (instancetype)initWithName:(NSString *)name
                         age:(NSInteger)age {
    self = [super init];
    if (self) {
        _name = name;
        _age = age;
    }
    return self;
}

- (instancetype)initWithName:(NSString *)name {
    return [self initWithName:name age:0];
}

- (instancetype)initWithAge:(NSInteger)age {
    return [self initWithName:nil age:age];
}

+ (instancetype)personWithName:(NSString *)name
                           age:(NSInteger)age {
    return [[[Person alloc] initWithName:name age:age] autorelease];
}









@end
